Refactor Nginx configuration and update project dependencies

- Cleaned up the Nginx configuration for the Coolify deployment, ensuring proper formatting and organization.
- Updated the `pyproject.toml` file to maintain consistent formatting.
- Reformatted the `requirements.txt` file for better readability while keeping the dependencies unchanged.

backend/app/routers/models.py

@@ -1,47 +1,47 @@
-"""Models router: list and refresh the OpenRouter model cache."""
-from fastapi import APIRouter, Depends, HTTPException, Query, status
-
-from ..db import get_conn, get_write_lock
-from ..dependencies import get_current_user, require_admin
-from ..services import models as models_service
-
-router = APIRouter(prefix="/models", tags=["models"])
-
-
-@router.get("/")
-async def list_models(
-    modality: str | None = Query(
-        None,
-        description="Filter by output modality: text, image, video, audio",
-    ),
-    _: dict = Depends(get_current_user),
-):
-    """Return cached models. Auto-refreshes cache if stale (older than 24 h)."""
-    conn = get_conn()
-    if models_service.is_cache_stale(conn):
-        async with get_write_lock():
-            # Re-check inside lock to avoid redundant parallel refreshes
-            if models_service.is_cache_stale(conn):
-                try:
-                    await models_service.refresh_models_cache(conn)
-                except Exception as exc:
-                    raise HTTPException(
-                        status_code=status.HTTP_502_BAD_GATEWAY,
-                        detail=f"Failed to refresh model cache: {exc}",
-                    )
-    return models_service.get_cached_models(conn, modality)
-
-
-@router.post("/refresh", status_code=200)
-async def refresh_models(_: dict = Depends(require_admin)):
-    """Force-refresh the model cache from OpenRouter. Admin only."""
-    conn = get_conn()
-    async with get_write_lock():
-        try:
-            count = await models_service.refresh_models_cache(conn)
-        except Exception as exc:
-            raise HTTPException(
-                status_code=status.HTTP_502_BAD_GATEWAY,
-                detail=f"OpenRouter error: {exc}",
-            )
-    return {"refreshed": count}
+"""Models router: list and refresh the OpenRouter model cache."""
+from fastapi import APIRouter, Depends, HTTPException, Query, status
+
+from ..db import get_conn, get_write_lock
+from ..dependencies import get_current_user, require_admin
+from ..services import models as models_service
+
+router = APIRouter(prefix="/models", tags=["models"])
+
+
+@router.get("/")
+async def list_models(
+    modality: str | None = Query(
+        None,
+        description="Filter by output modality: text, image, video, audio",
+    ),
+    _: dict = Depends(get_current_user),
+):
+    """Return cached models. Auto-refreshes cache if stale (older than 24 h)."""
+    conn = get_conn()
+    if models_service.is_cache_stale(conn):
+        async with get_write_lock():
+            # Re-check inside lock to avoid redundant parallel refreshes
+            if models_service.is_cache_stale(conn):
+                try:
+                    await models_service.refresh_models_cache(conn)
+                except Exception as exc:
+                    raise HTTPException(
+                        status_code=status.HTTP_502_BAD_GATEWAY,
+                        detail=f"Failed to refresh model cache: {exc}",
+                    )
+    return models_service.get_cached_models(conn, modality)
+
+
+@router.post("/refresh", status_code=200)
+async def refresh_models(_: dict = Depends(require_admin)):
+    """Force-refresh the model cache from OpenRouter. Admin only."""
+    conn = get_conn()
+    async with get_write_lock():
+        try:
+            count = await models_service.refresh_models_cache(conn)
+        except Exception as exc:
+            raise HTTPException(
+                status_code=status.HTTP_502_BAD_GATEWAY,
+                detail=f"OpenRouter error: {exc}",
+            )
+    return {"refreshed": count}